Analyst downgrades: LUV, AMR, COP, CMCSA and TWC

MOST NOTEWORTHY: Southwest Airlines, AMR Corp, ConocoPhillips, Comcast and Time Warner Cable were today's noteworthy downgrades:

Citigroup downgraded shares on both Southwest Airlines (NYSE: LUV) and AMR Corp (NYSE: AMR) to Hold from Buy to reflect elevated risks from continued high fuel prices and relative valuations.
Deutsche Bank lowered shares of ConocoPhillips (NYSE: COP) to Sell from Hold on valuation noting that 13 out of the past 15 years, integrated oils have underperformed during the period October 1st to December 5th. They also believe the company's 3rd October trading statement could raise concerns over Q4. on valuation noting that 13 out of the past 15 years, integrated oils have underperformed during the period October 1st to December 5th. They also believe the company's 3rd October trading statement could raise concerns over Q4.
Soleil downgraded shares of Comcast Corporation (NASDAQ: CMCSA) and Time Warner Cable (NYSE: TWC) to Hold from Buy due to concerns about the company's prospects in a weakening economy.

OTHER DOWNGRADES:

RBC Capital downgraded Research in Motion Limited (NASDAQ: RIMM) to Outperform from Top Pick.
Citrix Systems (NASDAQ: CTXS) was downgraded to Neutral from Buy at Banc of America.
Deutsche Bank lowered shares of VistaCare (NASDAQ: VSTA) to Sell from Hold and Publicis (PUB) to Hold from Buy.
Thomas Weisel downgraded SunPower Corporation (NASDAQ: SPWR) to Market Weight from Overweight.